PEAR AND QUINCE INSECTS 241 



quince trees than the more erect plum trees, and this method 

 of control is now little used in commercial orchards. 



The beetles are hard to kill by spraying with an arsenical, 

 because they eat but very little of the skin of the fruit in making 

 their punctures and because of the dense fuzzy covering of the 

 fruit on which the poison is deposited. The use of Paris green 

 or London purple has not given satisfactory results, but there 

 is considerable evidence to show that spraying with the more 

 adhesive arsenate of lead is of considerable value in reducing 

 the number of punctures. It should be used at the rate of 

 5 or 6 pounds to 100 gallons of water or combined with the 

 proper fungicide. Two applications should be made, the first 

 when the beetles first appear and the second about a week 

 later. 



Reference 



Cornell Agr. Exp. Sta. Bull. 148. 1898. 



Other Quince Insects 



CoDLiN-MOTH : apple, p. 10. 



Green fruit-worms : apple, p. 39. 



Bud-moth : apple, p. 42. 



Fruit-tree leaf-roller : apple, p. 62. 



Apple leaf-skeletonizer : apple, p. 67. 



Leaf-crumpler : apple, p. 68. 



Resplendent shield-bearer : apple, p. 75. 



White-marked tussock-moth : apple, p. 100. 



Yellow-necked apple caterpillar : apple, p. 123. 



Apple leaf-aphis : apple, p. 147. 



Apple bud-aphis: apple, p. 151. 



Woolly aphis : apple, p. 1.53. 



Buffalo tree-hopper : apple, p. 160. 



San Jose scale : apple, p. 162. 



Oyster-shell scale: apple,'p. 171. 



Scurfy scale : apple, p. 176. 



Round-headed apple-tree borer : apple, p. 185. 



Flat-headed apple-tree borer : apple, p. 194. 



Twig-pruner : apple, p. 200. 



R 



